Heir to Thorn and Flame - Ben Alderson

Married to a ruthless prince, for years Max had to serve and obey the vicious magical nobles. Now, he is one of them.
When the heir to the throne attacks him, Max accidentally responds with a lethal burst of magic. Max is certain he will be executed. But his power is too rare and precious for that....
Instead, the king forces him to become the boy he killed, taking on the identity and duties of the heir. That includes an arranged marriage—to the dangerously attractive Prince Camron.
Living a lie, Max knows he can trust no one. Not Camron. And definitely not Simion, a handsome, dragon-riding spy sent to test his loyalty.
As a deadly struggle for power begins and desire sparks, Max must protect his secret and his heart at all costs.
Heir to Thorn and Flame is a passionate fantasy romance that will have you listening late into the night. Featuring slow-burn, dark secrets, arranged marriage, and found family, it is perfect for fans of Sarah J. Maas, Elise Kova, and C.S. Pacat.
Previously published as The Lost Mage, this expanded version begins a series that builds in heart-pounding tension and steam.